Mining-machine.



No. 7|I|2,|47;4 Patented lune I0, |902. J. M. MGHUGH.'

MINING MAGHINE.4

(Appliclton med 17, 1901.)

3 Sheets-Sheet l,

(No Model.)

Witnesses Tn: -humus PETERS m4. Primo-umm wASHmGvau. m c,

N0. 702,I47. Patented .lune I0, IIQNZ.l J. M. MCHUGH.

MINING IIAII'IINE.4v

l(Appximtmu med n. 17, 1901.,

Q Sheets-Sheet 2.

(No Model.)

l nnto': am hijita! 72% f 7 l No. 702,I4 7. lPatented lune I0, |902. J. M. MGHUGH.

MINING MACHINE. (Appueion mea :u xv, 1901.)

3-Shaetsf-Sh'eat 3.

(No Modl.)

Witnesses: v

1H: wams PETERS ca.; Pnmuumo., wASMlNoToN. D. c.

UNITED STATES n PATENT EEICE.

JAMEs M. MCHUG'H, or BOSTON, PENNSYLVANIA.

MINING-MACHINE.

SPECIFICATION formingpart of Letters Patent No. 702,147, dated J' une 10, 1902.

Application filed January 17, 1901. Serial No. 43,603. (No model.)

To all whom/ritmo@ concern,.-

Beit known that I, JAMEs M. MCHUGH, a resident of Boston, in the county of Allegheny and State of 'Pennsylvania, have invented a new and usefull'mprovement in MiningMa chines; and I'do'hereby declare the following to be a full, clear, and exact description thereof.

My invention relates to miningmachines, and more particularly to that class of miningmachines in which the cutting is done by y means of chains carrying. suitable cutters.

The objects of my invention are to provide means for holding the machine rigidly in pos ition when in operation, so as to keep the cutter-frame in a straight course and prevent it from swervingl to one side, and to provide,

To enable others skilled in the art to make' and use my invention, I will describe the same 25 more fully, referring to the accompanying drawings, in which-- Figure 1 is a side view of my improved mining-machine. Fig. 2 is a rear end view. Fig. 3 is a plan View, partly broken away. Fig. 4 is a front View Ofthe stationary frame and cutter-frame, partly in section. Fig-".5 is an enlarged plan view of the cutter-frame; Fig. 6 is a section on line 6 6, Fig. 5. Fig. 7 is a front view of the cutter-frame and forward support therefor, and Figs. 8 and 9 vare details of the forward jack.

The stationary frame of the machine, upon which the working parts are mounted, com- ;prises the rear end portion 2 and the front end portion 3, connected by the channel-bars 4. The rear end portion 2 is provided vwith the horns 5, to be engaged by a crowbar when iet is desired to change the position of the rame.

Bolted or otherwise secured to the frame.

ver 36.

the carriage,as will more fully hereinafter appear. V'A carriage 14 rests on and is adapted to move along the rails 6 and 7, the upper edgesv GfFandf-fa of the flanges of said rails forming `bearin. rfaces forsaid carriage. A worm 13 is journaled in suitable bearings in said carriagef14 and engages with a wormra`ck l2, secured to the rail 7. The carriage 14 is provided with inwardly-projecting portions 15, which enter the grooves 9 of the rails .and prevent the carriage from lifting or rising from the rails. Vhen the worm 13 is rotated by the means hereinafter described,

it' feeds the carriage along the frame in either direction, depending; u pon the direction of the rotation of said worm, said carriage mov- 'ing on the upturned flanges of the rails and being supported at diiferent points.

l Supported on the carri-age 14 is'the motor 16,0f anysuitable construction,providedwith the circuit-controller 17. On the motor-shaft 18 is the pinion 19, which Vmeshes with the large gear-wheel 2O on the shaft 21, journaledV 'in the carriage 14. Abevelpinion 22 on the lon the shaft 30., A clutch 35,fast on the shaft 30, is adapted to engage the worrn-wheel 34 or thegear 29,according as it is desired to feed forward the cutter-frame 0r withdraw vthe same, and said clutohis operated by the le' vided with a head 36a, in which 'are formed holes for, receiving'a Spanner-wrench, or the end of said shaft is otherwise suitably formed for receiving awren'ch, crank, or similar 'de-y vice, whereby said shaft may be rotated by hand.

A resistance-box 37 for. the motor is shown in Figs. 2 and 3. t

The cutter-frame, which is secured to the forward end of carriage 14is triangular in A gear-wheel 26 onthev The outer end of the shaft 30 is pro-v n IOO form and comprises the side portions 38with the channel or groove 39 for the passage of the cutter-chain, and the end portion 40, with a like groove for said chain. At the corners of the end portion 40 are journaled the idle sprocket-wheels 41, around which the chain passes.

Centrally of the cutterframe is the guideplate 42, Secured at its forward end to the end portion 40 and at ils rear end to the carriage 14. The rear end of the cutter-frame is secured to the guide-plate 42. Said guideplate 42 has the slots 43 (shown in dotted lines, Fig. 3) and is connected to the extension 44 of the carriage by the bolts 45, passing through openings in said extension and said slots in said gnide-plate- By this construction any slack in the chain may be taken up, it only being necessary to loosen the bolts 45 and advance the guide-plate and withit the cutterframe carried thereby. To provide for the adjustment of the guide-plate, I have provided a screw-feeding device consisting of the screw-bar 4G, engaging a threaded opening 47 in the carriage 14, said screw-bar having the shoulder 48 and the head 49. The portion of said bar between the shoulder 48 and head 49 rests in a seat 50 on the guideplate. By turning the bar in the proper direction the cutter-frame may be advanced to take up slack in chain or maybe withdrawn, as desired.

The front end portion 3 of the stationary frame has the opening 51, through which the guide-plate 42 passes.

A cutter-chain made up of links in the usual or any desired way is used, said chain passing around the sprocket-wheels 25 and 41 and being guided in the groove 39.

At the front end 8 of the stationary frame are the bearings 66, adapted to receive the shaft G7, on which is mounted the swinging frame 68. This frame 68 has a bearing 69 to receive a toothed stud 70, adapted to be turned by inserting a suitable bar in the opening 71. This toothed stud 70 engages with the teeth of a rack-bar 72, inclosed within a guideway 73 in the frame 68. A pawl 74, carried by the pin 75, is secured to the frame 68, said pawl engaging the teeth of the stud 70. At the upper end of the rack-bar 72 is the tooth 76, which is forced into the face of the coal in the manner fully hereinafter set forth.

At the rear end of the machine are the swinging jacks 77, composed of the threaded bars having the pointed heads 78, adapted to be raised or lowered by means of the nut 79, having the handles SO.

When in use, my improved machine is placed in proper position with reference to the wall of coal to be cut, and when so located the stationary frame is jacked at its rear and forward ends to prevent displacement of same when the machine is in operation. At the rear end the pointed heads 7 8 of the jacks 77 are forced into the roof, said jacks being located at such an angle as to resist back thrust of the machine. At the forward end of the stationary frame the tooth 76 is forced into the roof orwall of the mine by turning the toothed stud 70. The frame GS is pivot ed to the frame of the machine, and consequently maybe iixed at any desired angle, and the bar 72 is mounted at an angle to the longitudinal axis of the machine in this frame 68 and points in a direction opposite to that in which the cutter-chain travels. The cutter-chainis designed to travel from right to left, and the resistance of the coal against the cutters has a tendency, therefore, to swing the front end of the machine toward the right; but the inclined bar 72 points in that direction, and therefore resists this tendency ofthe machine to swing and holds it rigidly in position, so as to keep the cutter-frame in a straight course. As power is applied to operate the machine the tendency of the cutterchain traveling across the front of the coal from right to left is to throw the frame of the machine ou t of line, so that the rear end of said frame would move to the right and prevent a straight cut into the coal. The rack-bar 72, however, prevents this tendency to swing the frame out of line, and a straight cutis accomplished. Through the mechanism described the cutter-chain is driven, and the carriage advances at the same time to feed the cutter-frame into the cut, said carriage being moved by the action of the worm-Wheel13, working in the worm-rack 12. The carriage moves readily over the rails 6 7, and the worm and worm-rack form a strong and durable feed with minimum amount of power. In case the cutters encounter a substance which is harder than coal the machine will not be able to cut the same at the rate of feed provided by the automatic worm-feeding device, and the machine is liable to become stalled. In that event the clutch 35 will be moved to its neutral position and the cutter-frame will be fed slowly forward by rotating the worm-shaft 30 by means of a Spanner-Wrench or similar device secured to the outer end of said shaft. By this means the cutter-frame can be fed forward at just the rate which Will permit the machine to cut lthrough the hard substance. When the cut has been made, by reversing the clutch 35 the gear-Wheel 29 is rotated through the idle gear 27 and gear 26, which is operated by the motor through the mechanism described. This reverses the direction of rotation of the shaft 30, and consequently worm-wheel 13. In this manner the cutter-frame is Withdrawn from the cut.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. In a mining-machine, the combination of a frame, two standard I-rails secured to said frame in substantially the same horizontal plane with their Webs in a horizontal position and their flanges extending upward, the downwardly-extending iianges of said rails having grooves formed therein, a travel- IOO IIO

ing carriage resting on the edges of said flanges, inwardly-extending lips on said carriage vadapted to enter the grooves in the rails, a cutter frame and chain supported by said carriage, and mechanism for moving said carriage along said rails and for driving said chain.

2. In a mining-machine, the combinationof -a suitable frame, a traveling carriage, a cutter-frame and cutter-chain, mechanism for moving said carriage and driving said chain, a swiiging frame at Jhe forward end of said frame, said frame having an inclined guideway therein, a jack-bar in said'gnide- Way, and means for raising and lowering said bar.

3. in a mining-machine,the combination vofa suitable frame, a; traveling carriage, a cutter-frame and cutter-chain, mechanism for moving saidcarriage and driving said of said frame, said frame having van inclinedv "2o chain', a swinging frame at the forward end.

guideway therein,'a jack-bar in said gnidej way, said bar having teeth therein, a pinion engaging said teeth, and a ratchet-andp'awl device for holding said bar in its adjusted position.

In'testimony whereof I, the said JAMES M. MCHUGH,v have hereunto set my hand.

JAMES M. MCHUGH.d

l Witnesses:

J. D. BUCKLES?, RoBT. D. TOTTEN. 

